Friction-gear.



' tion shell., a plurality pair rito.

' JOHN E. l0C'lll'lll'o', 0l? CHCAG-O, ILLINOIS, ASSIGNOR T0 WILLIAM H.MINEE., 0F

' CHAZY, YORK.

salomon-enen..

To all whom it 'may ncolwe'l'n: p

Be it known that I, JOHN F. UConnon, a citizen of the United States,residing at Chicago, inthe county of Cook and State of llllinois, haveinvented a certain new and use ful Improvement in Friction-Gears, ofwhich the follow-ing is a full, clear, concise, an exact description,reference being had. to the accompanying drawings, forming a part ofthis specification.

i rllhis invention relates to improvements in friction gears.-

Heretofore, in one well kno-wn type lof friction gear employed forrailway draft rigging, it has been customary to employ a fricof frictionshoes cospring means to resist between the shoes and operable therewith,relative movement shell, a wedge, and a single antifriction tit `willnot, with consequent rollerl interposed between each shoe and .thewedge. Due to the ,necessity of keeping down the manufacturing cost,none of the parts above mentioned are machined but are either foundry orforging products. As will be evident, where a single anti-friction rollis -interpos'ed between each shoe and the wedge, the pressuretransmitted between said elements is necessarily concentrated alongsingle lines with the result that great care must be exercised in thematerial used and design of the parts in order to insure thenccessarystrength to withstand the concentrated pressures mentioned.Obviously, if a plurality of anti-friction rollers were used in lieu ofthe present single anti-friction rollers, the pressure would bedistributed over a greater area and would permit lighter designs of theparts, but due to the fact that `the parts are practically necessarilyfoundry and forging products without" any machinbeen experienced inoband maintaining proper contact for a plurality of anti-frictionrollers. As will be obvidus, while a single roller will remain in propercontact with two opposed surfaces, when two or more anti-frictionrollers are interposed between opposed opposed surfaces are notmaintained in proper parallel relation, one of the rollers may be inproper contact whereas the other imperfection in operation and wear-ofthe parts.

The object of my invention is to provide a simple ex edient which willpermit the use of aplurelity of anti-friction rollers betweenSpecification of Letters Patent.

surfaces,` if the Patented J an. "K, 1919.

lppliqatlon led March il, 1918. Serial No. 220,235.

opposed pressure surfaces and atthe same time'insure the necessaryproper contact between all of the rollers and the opposed surfaces andalso permit commercial manufacture of the parts without the necessity ofeX- pensive machining or other operations.

' ln the drawing forming part of this specification, Figure 1 is a partlongitudinal, vertical section, part elevational view of aportion of arailway draft rigging showing my improvements in connection therewith.Fig. 2 is a vertical, transverse, sectional view, taken on the line 2-2of Fig. 1. Fig. 3 is an end View of the improved wedge element lookingfrom the inner end of the wedge to ward its outer end. Fig. 4: is adetail perspective of one ofthe friction shoes. Fig. 5 is an enlarged,sectional view to more clearly illustrate the manner of carrying out theinvention.

ln said drawing, 10-10 denote channelshaped center or draft sills of arailway car, to the inner faces of which are secured the usual rearstops 11 and front stops 12 with which cooperate rear and frontfollowers 13 and 14;, respectively. The draw bar 15 of the draft riggingis connected to the shock absorbing mechanism proper by .any suitablemeans, such as the yolre 16, and all of the parts may be supported by asaddle plate 17.

The shock absorbing mechanism or gear And cula-rly arranged series o-ffriction shoes B, a

wedge C, main spring D, retaining bolt E and apair of anti-frictionrollers F--F between each shoe and the'wcdge. i

The casting A is of general cylindrical form having a friction cylinderor shell 18 at its forward end a spring casing 19 rearwardly thereof andan integral back wall 20. Thespring D is seated within the casing 19 inthe usual manner and bears at its forward end against the inner ends ofthe friction shoes B and a washer 21 which may be mounted within theshoes.

Each of the friction shoes B is provided on its inner side with a wedgeface or surface 22 and a roll seatO 23 at the outer yend of the wedgeface 22.

',llhe wedge or pressure-transmitting member C, is provided with aseries of wedge faces, one for each of the wedge faces of the frictionshoes, and in order to carry out my A l to est

the corresponding wedgeA face 22 of a friction shoe. The bottom of eachrecess 24 is l provided with a series of shallow grooves between. Ineach of. sai

` vide a hard --25 leaving narrowQrid I recesses 24 is placed a hardenedsteel insert 27, the latter being held in place by peening'or upsettingthe edge portions of the recess, as indicated at 28-28. The wedge C isalso provided withja roller seat 29 .for each of its wedging faces and apair of anti-friction rollers F--F isl interposed' between each shoe andthe wedge;

` In carrying out my invention, the shoes will preferabl be made ofsteel so as to proy caring surface forthe antifriction rollers whichalso will preferably be madeof steel. The 4inserts win also be made ofsteel and the lwedge-can be made of Imalleable iron. Withthe'partsassembled as shown, it is evident that upon appllcatlon of heavypressure on the wedge C, any un-.

evenness -1n the relation of the opposed wedgelfaces of the shoes andWedge C (the latter being of course formed by the steel inserts) will beautomatically compensated for by the lupsetting of the narrow ribs 26-26which'form the backing for the steel inserts, it. beingrememberedwhatthe said ribs 26 are of course, of malleable iron. In thismanner, thesteel inserts will be brought to their pro er, relation withrespect` to the opposed we ge faces of the shoes so that the device canbe comparatively cheaply manufactured and slight inequalities inmanufac.

ture overcome in the actual operation 'of the, mechanism, and I amenabled to obtain all the advantages of the useof a plurality ofanti-frictiont rollers to thereby dlstribute the pressures over a lar erarea and avoid the concentration hereto ore encountered in frictiongears of this general type.`

1. In a friction kshock absorbin mechanism, the combination with africtlon shelli i of friction shoes coperable therewith an having wedgefaces, spring means for resisting relative movement between the shoesland shell, a wedge member of relatively soft metal, inset bearing platesof relatively hard 26-26 thereof riction shoes coperable therewith,spring means resisting relative movement between the shoes andshell,awedge member, a

lurality of anti-friction` rollers interposed tween each shoe and saidwedge member, said wedge member and shoes havin opposed bearing faceslfor the anti-friction rollers, one set of said bearin faces being formedby inserts of relative y hard material, and means adapting said .insertsto automatically adjust themselves by deformation ofgthe metal onwhichrthey are Seated,

upon the application of pressure.

In a mechanism including a pair of elements adapted to have pressuretransmitted from one to the other, the combination with a-p'lurality ofanti-friction rollers interposed between said elements, one of said lelements being made of relativel hard metal and provided with anintegral caring surface for said rollers, of an inset relatively hardAbearin piecefor said rollers in the other of said ment being formed lofrelatively soft metal, the portion of the last named element againstwhich the inset piece bears, being provided with a series of relativelynarrow spaced ribs to thereby permit deformation' of said ribs for theautomatic adjustment. of the inset piece upon transmission of pressurebetween the two elements.

In witness that I claim the foregoing I have hereunto subscribed my namethis 14th day of Feb., 1918;

JOHN F. OCON N OR.

nism the combination with a friction shell,

elements, the last named ele-I sal

